Thanks FoxKat, but that only disables enhanced location till the next time I turn on Location.
And It's not so much that I don't want to use enhanced location services, it's that I don't want Google to use them to track my location. What I was disagreeing to is Google using my enhanced location, not the enhanced method per se.
I notice from searching the web that some phones have a 'Location Reporting' menu option that you can enable/disable, but my phone doesn't have that menu item; only 'Location History'. I've disabled that, but I don't know if it also disables Location Reporting.
Daniel